下面是一个跨浏览器的解决方案，如果你不想使用jQuery:

/**
 * Resizes the given iFrame width so it fits its content
 * @param e The iframe to resize
 */
function resizeIframeWidth(e){
    // Set width of iframe according to its content
    if (e.Document && e.Document.body.scrollWidth) //ie5+ syntax
        e.width = e.contentWindow.document.body.scrollWidth;
    else if (e.contentDocument && e.contentDocument.body.scrollWidth) //ns6+ & opera syntax
        e.width = e.contentDocument.body.scrollWidth + 35;
    else (e.contentDocument && e.contentDocument.body.offsetWidth) //standards compliant syntax – ie8
        e.width = e.contentDocument.body.offsetWidth + 35;
}

这是一个坚固的解决方案

function resizer(id)
{

var doc=document.getElementById(id).contentWindow.document;
var body_ = doc.body, html_ = doc.documentElement;

var height = Math.max( body_.scrollHeight, body_.offsetHeight, html_.clientHeight, html_.scrollHeight, html_.offsetHeight );
var width  = Math.max( body_.scrollWidth, body_.offsetWidth, html_.clientWidth, html_.scrollWidth, html_.offsetWidth );

document.getElementById(id).style.height=height;
document.getElementById(id).style.width=width;

}

html

<IFRAME SRC="blah.php" id="iframe1"  onLoad="resizer('iframe1');"></iframe>

<script type="application/javascript">

function resizeIFrameToFitContent( iFrame ) {

    iFrame.width  = iFrame.contentWindow.document.body.scrollWidth;
    iFrame.height = iFrame.contentWindow.document.body.scrollHeight;
}

window.addEventListener('DOMContentLoaded', function(e) {

    var iFrame = document.getElementById( 'iFrame1' );
    resizeIFrameToFitContent( iFrame );

    // or, to resize all iframes:
    var iframes = document.querySelectorAll("iframe");
    for( var i = 0; i < iframes.length; i++) {
        resizeIFrameToFitContent( iframes[i] );
    }
} );

</script>

<iframe src="usagelogs/default.aspx" id="iFrame1"></iframe>

<iframe src="hello.html" sandbox="allow-same-origin"
        onload="this.style.height=(this.contentWindow.document.body.scrollHeight+20)+'px';this.style.width=(this.contentWindow.document.body.scrollWidth+20)+'px';">
</iframe>

Javascript被放置在头文件:

function resizeIframe(obj) {
        obj.style.height = obj.contentWindow.document.body.scrollHeight + 'px';
      }

下面是iframe html代码:

<iframe class="spec_iframe" seamless="seamless" frameborder="0" scrolling="no" id="iframe" onload="javascript:resizeIframe(this);" src="somepage.php" style="height: 1726px;"></iframe>

Css样式表

>

.spec_iframe {
        width: 100%;
        overflow: hidden;
    }

我知道这个帖子很旧了，但我相信这是另一种方式。我在我的代码中实现了。完美的工作在页面加载和页面大小调整:

var videoHeight;
var videoWidth;
var iframeHeight;
var iframeWidth;

function resizeIframe(){
    videoHeight = $('.video-container').height();//iframe parent div's height
    videoWidth = $('.video-container').width();//iframe parent div's width

    iframeHeight = $('.youtubeFrames').height(videoHeight);//iframe's height
    iframeWidth = $('.youtubeFrames').width(videoWidth);//iframe's width
}
resizeIframe();


$(window).on('resize', function(){
    resizeIframe();
});